The only way to know is to find a dealer and bring it in to your system for demo. The "Modwright sound" if there is any (and I should know, I've owned just about everything Dan makes or mods) is a very neutral presentation, especially for a tube pre with tube rectification. The classic tube bloom or midrange bloat is not there; instead a slight color shift to the warmer side of neutral....barely. The bass is deeper than you'd expect from tubes, and the dynamics, although not in your face, are quite amazing. The overall presentation is usually a few rows back from front row, but this has way more to do with system makeup/synergy. For the dual mono 2 box 36.5 you can alter the color palette and dynamic (seat position) slightly more in that you can tube roll both the signal tubes and the large pair of rectifiers in the PS.
Read Srajan's comments, both in his 36.5 review on 6Moons (appended twice once the PS was released) and his comments when using the 36.5 with other reviewed gear. It is his pre of choice for basically all ss amps, and a few tube ones.
P.S. Heard a few CJ pre's in my day but never in my system, so no comment on the differences per se.